81482859 has 12 divisors (see below), whose sum is σ = 122815056. Its totient is φ = 51959952.

The previous prime is 81482857. The next prime is 81482873. The reversal of 81482859 is 95828418.

It is a happy number.

It is not a de Polignac number, because 81482859 - 2¹ = 81482857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81482851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 196612 + ... + 197025.

It is an arithmetic number, because the mean of its divisors is an integer number (10234588).

Almost surely, 2^81482859 is an apocalyptic number.

81482859 is a deficient number, since it is larger than the sum of its proper divisors (41332197).

81482859 is a wasteful number, since it uses less digits than its factorization.

81482859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393666 (or 393663 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The square root of 81482859 is about 9026.7856405256. The cubic root of 81482859 is about 433.5329253457.

The spelling of 81482859 in words is "eighty-one million, four hundred eighty-two thousand, eight hundred fifty-nine".